Causes of a Path Migration
There are two possible causes for a path migration:
Software command. Software commands the two QPs or two EECs to perform a path migration. Some of the circumstances that might cause software to trigger a path migration are:
- - Load-balancing. After examining the various performance counters (see “Performance Management” on page 1019) throughout the fabric, software might trigger a path migration to ease traffic congestion in the fabric.
- - Excessive soft failures. Software may determine (by examining various performance counters) that a specific link or a switch or router is experiencing frequent soft (i.e., correctable) errors that indicate a possible imminent hard failure.
Repetitive hardware failure. A repetitive ...
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